Vegetarian Eating and Enough Protein: The Numbers That Work

If you train and you don't eat meat, the first thing everyone asks is whether you can hit your protein. You can, but it doesn't happen by accident — it takes a handful of habits repeated daily and a real sense of how much of what goes on the plate. Here are the numbers instead of the slogans.

How much you actually need

The baseline recommendation for someone who doesn't train is 0.8 g of protein per kilogram of body weight. For someone lifting three to five times a week the number is 1.6 to 2.2 g/kg. Plant sources digest slightly less efficiently and carry less leucine, so it's sensible to sit in the upper half of that range and add roughly 10 percent on top.

For a 75 kg person that means 135 to 150 g of protein per day. In a calorie deficit, when you're cutting, push it to 2.0–2.4 g/kg — 150 to 180 g — because higher intake protects muscle while you're eating less. Spread it across 4 meals of 30–40 g rather than dumping 80 g into dinner.

Where the protein actually comes from

Values are per 100 g of the food as you eat it (cooked, where that makes sense):

• Seitan — 24 g
• Tempeh — 19 g
• Firm tofu — 12–16 g
• Low-fat cottage cheese — 12–13 g
• Hard cheese — 25 g, but with 25–30 g of fat
• Greek yogurt — 9–10 g
• Cooked lentils — 9 g (25 g dry)
• Cooked chickpeas and beans — 8–9 g
• Edamame — 11 g
• Egg — 6.5 g each
• Rolled oats — 13 g
• Pumpkin seeds — 19 g
• Peanut butter — 25 g, but also 600 kcal

The obvious problem: legumes land around 9 g per 100 g cooked, so a 150 g scoop of lentils is only 13–14 g. Legume portions have to be bigger than people usually serve — 250 to 300 g cooked per meal.

One day, built out fully

Example for a 75 kg person targeting about 140 g:

1. Breakfast: 80 g oats (10 g) + 250 ml milk (8 g) + 30 g pumpkin seeds (6 g) = 24 g
2. Lunch: 300 g cooked lentils (27 g) + 60 g hard cheese (15 g) + vegetables = 42 g
3. Snack: 250 g Greek yogurt (24 g) + 20 g peanut butter (5 g) = 29 g
4. Dinner: 200 g firm tofu (28 g) + 200 g cooked quinoa (9 g) + salad = 37 g

That's about 132 g. Two eggs somewhere in the day, or another 100 g of yogurt, closes the gap. If that volume of food genuinely won't fit, a scoop of protein powder (plant or whey, doesn't matter) covers 20–25 g without filling you up — a tool, not a requirement.

Complete proteins — how much this really matters

Grains are low in lysine, legumes are low in methionine. The old advice about combining them within a single meal is outdated: your body only needs all the amino acids to show up within 24 hours. If you eat legumes and soy every day, lysine isn't your bottleneck.

What does matter is leucine — you want roughly 2.5–3 g per meal to switch muscle protein synthesis on properly. Dairy, soy and eggs hit that in a normal portion; lentils and beans need either a bigger serving or some cheese, yogurt or tofu alongside.

What breaks before protein does

• B12 — lacto-ovo vegetarians often sit near the bottom of the range. Get the lab value before you start taking anything blind.
• Iron — plant iron absorbs poorly. Vitamin C with the meal (peppers, lemon, parsley) raises absorption two to three fold; move coffee and tea 45–60 minutes away from meals.
• Omega-3 — a tablespoon of ground flax or 30 g of walnuts covers ALA, but conversion to EPA and DHA is weak, so if you don't eat fish, raise it with your doctor.
• Zinc, iodine, vitamin D, calcium — none of these track themselves; check them on an annual panel.
• Fibre — jumping from 20 to 50 g a day means bloating. Add 5 g per week and drink 2–3 litres of water.

Training doesn't change

Nothing in the programme runs differently because you skip meat: 3–4 strength sessions a week, 10–20 working sets per muscle group per week, 5–30 reps, each set taken to within 2–3 reps of failure. Vegetarians do average lower muscle creatine stores, so 3–5 g of monohydrate a day tends to produce a more noticeable strength and rep difference for them than for meat eaters.

If progress stalls, first check whether you've been using the same loads and the same set count for weeks — then blame the diet.

When to see a doctor

Don't wait it out if any of this shows up:

• Fatigue lasting more than three weeks, breathlessness on light effort, pallor or dizziness.
• Tingling or pins and needles in hands and feet, poorer concentration, mood changes — possible signs of B12 deficiency, and not something to guess at with food.
• Increased hair shedding, brittle nails, missed periods.
• Unintentional loss of more than 5 percent of body weight in a month.

Ask for a full blood count, ferritin, B12, vitamin D and TSH. If you've been vegetarian longer than six months, one panel a year is a reasonable minimum. Pregnant people, children and adolescents, and anyone with kidney or bowel disease should set protein intake and supplements with a doctor rather than with the internet.

The short version

• Target 1.6–2.2 g of protein per kilogram, split into 4 meals of 30–40 g.
• Legumes give about 9 g per 100 g cooked — portions need to be 250–300 g, not 150 g.
• You don't have to combine amino acids within a meal; across the day is enough.
• B12, iron and vitamin D break before protein does — get a panel once a year.
• Training stays identical: 10–20 sets per muscle group weekly, taken close to failure.